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	1. Environmental and spatial effects on the Qinghai-Tibet plateau plant community species composition
	Jia Peng,Jia Peng,Ma Yanqi,Du Guozhen
	Biology 08 November 2018
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (529K B)

	Abstract:Community structure is the focus of community ecology. Comparing the relative contribution of environmental and spatial variables on species composition is essential to understand the process of community assembly. In this study, we explored that the effects of regional spatial scale, local spatial scale and environmental variables on the species composition of meadow and steppe on the Qinghai-Tibet plateau. The results showed that environmental, regional and local spatial scale variables had significant effects on meadows and their functional groups, and the explanation of local spatial variables was relatively high. And the regional spatial scale variable had a significant effect on the species composition of the steppes and their functional groups. In addition, the total explanation of environmental and spatial variables accounted the highest for the legume groups species composition at the sample sites. And the sum of the explanation of impact factors on meadow functional groups was not equal to the effect on meadow species composition, and the same phenomenon in the steppe. The results demonstrated that environmental and spatial variables and the division of functional groups could fully detect and explain the species composition of community on the Qinghai-Tibetan Plateau.
	TO cite this article:Jia Peng,Jia Peng,Ma Yanqi, et al. Environmental and spatial effects on the Qinghai-Tibet plateau plant community species composition[OL].[ 8 November 2018] http://en.paper.edu.cn/en_releasepaper/content/4746329


	2. Habitats availability for wintering waterbirds as a response to water level in the Shengjin Lake, a newly designated Wetland of International Importance in China
	Li Chunlin
	Biology 03 May 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:Wetland losses and degradations worldwide have resulted in dramatic declines of wetland-dependent waterbirds populations and their habitats. Effective conservation plans to provide essential habitats for waterbirds in periodically inundated wetlands should be based on a deep understanding of the strong relationship between habitat availability and the hydrological regime. Based on waterbirds survey and remotely sensed image classification at various water levels, we investigated how habitat availability for wintering waterbirds responded to water level fluctuation in the Shengjin Lake, a newly designated Wetland of International Important in the middle and lower Yangtze River floodplain, China. During the field survey in the winter 2014-2015, we recorded up to 38 564 individuals of 47 waterbirds species, which could be categorized into four foraging guilds that primarily occur on grassland, mudflat, shallow water or deep water. Habitat availability for wintering waterbirds of all foraging guilds exhibited significant responses to the seasonal water level fluctuation in the lake. At high water level, deep water dominated the lake and could reach up to the peak of 14 500 ha. Along with the water recession during the wintering period, riparian grounds were gradually exposed to provide habitats for waders, shorebirds and geese, which could occupy more than 50% of the lake. The water level fluctuation also affected the landscape metrics, specifying in the increased diversity and decreased fragmentation of the riparian habitats during the water recession period. The artificial regulation of water level, however, changed the natural transition between aquatic habitats which would ultimately affect waterbirds diversity and distribution. We suggest stepwise water recession plans to facilitate waterbird conservation in the lacustrine wetlands in the Yangtze River floodplain, together with recovery of aquatic vegetation community, to synchronize exposure of foraging habitats with migration phonologies of different waterbirds guilds.
	TO cite this article:Li Chunlin. Habitats availability for wintering waterbirds as a response to water level in the Shengjin Lake, a newly designated Wetland of International Importance in China[OL].[ 3 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4732055


	3. Seed germination behaviour of six phylogenetically-related Caragana species reveals small phylogenetic constraints, but a strong relationship to the environment in which they evolved
	Wei-Nan Zhao,Xiang-Wen Fang
	Biology 16 December 2015
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:The seed-germination of the six phylogenetically-related Caragana species that thrive in arid to humid regions was investigated in a series of controlled temperature and water regimes. C. korshinskii (from an arid area), C. intermedia and C. microphylla (from semi-arid areas) had rapid seed germination, a high final seed germination percentage (GP), a large decrease in GP with an increase in temperature, but germinated at water/osmotic potentials as low as -1.2 MPa. However, C. arborescens and C. biosi (from semi-humid areas) had slow seed germination, a low final GP, which did not change with increase in temperature, and had no seed germination at water/osmotic potentials below -1.0 MPa. Seeds of C. stipatata (from a humid area) did not germinate until the seed coat was cracked after cold (4 C) had been imposed for 18 months. Using light microscopy, gaps were observed between the macrosclereids of the seed coat of species from the arid, semi-arid, and one species from the semi-humid areas (C. arborescens), but not the second species from semi-humid area (C. biosi). Gaps were not observed between the brachysclereids of the species from the humid area. The results showed that seed germination behaviour was not strongly conserved phylogenetically in the Caragana genus, but was strongly related to their seed coat structure and the environment in which they evolved. We conclude that the observed seed germination responses play an important role in determining the distribution of these species in the different environments of China.
	TO cite this article:Wei-Nan Zhao,Xiang-Wen Fang. Seed germination behaviour of six phylogenetically-related Caragana species reveals small phylogenetic constraints, but a strong relationship to the environment in which they evolved[OL].[16 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4671812

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